[GRASS-dev] v.out.ogr: faces export added (for KML and friends)

[Markus Neteler]

On Wed, Jun 14, 2006 at 09:49:36PM +1200, Hamish wrote:
> Markus Neteler wrote:
> > inspired by the new Linux version of Google Earth [1]
> > I have extended v.out.ogr to export faces, the GRASS
> > 3D vectors [2].
> 
> * do you know the status of "kernels"? Are they used by anything?

AFAIK it is implemented in the format but not used.
(kernels = 3D centroids)
 
> * must faces be flat polygons or can they be saddle/pringle shaped?

I dunno. You can easily test this with v.drape:
 2D polygon, drape over DEM

> * must the kernel fall on the face surface or do they float inside a
> volume defined by the faces?

I assume that kernels can float inside a volume.


Markus

> I know there is no 3D vector topology in GRASS (yet), but I'd like to
> try and be future proof where possible.
> 
> thanks,
> Hamish